A body si projected with velocity ` v_1` (A), At the same time , another body is projected vetically upwards from (B) with velocity ` v_2`. The point (B) lies vetically below the highestpoint Fig. 2 (CF).29. For bothe the bodies to colled ` v_2//v_1` should be
.

Options

A. ` 0.5`
B. ` 1`
C. ` sqrt 3//2`
D. ` 2//sqrt 3`

Answer

A

Explanation

The two bodies will collide at the highest point if bothe cover the same vertical height in the same time So.
` (v_1^2 sin^2 30^2)/( 2G) = v_2^2)/(2 g) ` or ` v_2/v_1 = sin 30^@ = 1/2 = 0.5`.